The United Nations (UN) Special Envoy for Syria Staffan De Mistura arrives for a press conference in Geneva, Switzerland, Sept. 1, 2016. The United Nations(UN) Special Envoy for Syria Staffan De Mistura said Thursday that high-level talks between officials from the United States and Russia working to implement a ceasefire in Syria are ongoing and likely to last until Saturday. (Xinhua/Xu Jinquan)
